Strangely she was refusing the side opposite the one that normally has fast let down. It is possible she's coming down with something as dd1 has a cold.
Bedtime went okay. She was a bit wary latching on, sucked well for a couple of minutes and then got gassy. I was able to wind her this time and she fed ok.
I like your suggestion of sitting her up to feed, I think I'll try that. Thanks.